What is the $O-O$ bond length in the ozone $(O_3)$ molecule (in $\text{ pm}$)?

Which of the following statements are true for the nitrate ion $(NO_3^-)$?
$(a)$ The coordination number of $N$ is $3$,and the structure is trigonal planar.
$(b)$ The formal charge on $N$ is $+1$.
$(c)$ The average formal charge on each $O$ atom is $-2/3$.
$(d)$ The average bond order of the $NO$ bond is $4/3$.
$(e)$ All $NO$ bond lengths are identical due to resonance.
Select the correct code:

Why is benzene extraordinarily stable though it contains three double bonds?

In which of the following pairs is the first one having more resonance energy than the second one?

The $C-O$ bond length in $CO$,$CO_2$ and $CO_3^{2-}$ follows the order.

Write the Lewis structure of the nitrite ion,$NO_{2}^{-}$